Beyond Day One: What Long-Term Testing Reveals About Roof Rejuvenation
Every roof-rejuvenation company claims to offer the best product on the market. Homeowners and contractors should therefore ask a more meaningful question:
What evidence supports that claim after the product has been subjected to aging—not just immediately after it is applied?
A rejuvenator can make a shingle appear darker or feel softer on day one. That does not necessarily demonstrate how the treated shingle will perform after years of exposure to heat, ultraviolet light, rain, temperature changes, and oxidation.
That is why Roof Rejuvenate USA commissioned third-party testing designed to evaluate performance after accelerated weathering.
We Asked PRI to Study Aging, Not Just Initial Results
Roof Rejuvenate USA, in collaboration with Sika, commissioned PRI Asphalt Technologies to evaluate our corn-derived rejuvenation technology.
The study did not simply apply the product to a new shingle and measure the immediate result. PRI used approximately 15-year-old asphalt shingles removed from a residential roof. Treated and untreated shingles were then subjected to a 1,500-hour accelerated-weathering study designed to simulate approximately five years of natural aging.
The evaluation included important performance characteristics such as:
Granule adhesion and loss
Cold-weather pliability
Tear strength
Structural durability
Appearance after weathering
Accelerated weathering is a controlled laboratory simulation—not a guarantee that every roof will perform identically. However, it provides a much more meaningful evaluation than testing a product only on the day it is applied.
The Results After Simulated Five-Year Aging
Following the 1,500-hour accelerated-aging study, the treated shingles continued to demonstrate measurable improvements over the untreated shingles.
Beyond Day One: What Long-Term Testing Reveals About Roof Rejuvenation
The PRI testing reported:
53% less granule loss: Treated shingles lost 0.67 grams of granules compared with 1.43 grams from untreated shingles.
66.7% improvement in cold-weather flexibility: Treated shingles maintained substantially better pliability after accelerated aging.
24% higher tear strength: Treated shingles measured 9.4 newtons of tear strength compared with 7.6 newtons for untreated shingles.
Visible color restoration: The treated shingles maintained a noticeably refreshed appearance.
These results matter because granule retention, flexibility, and structural strength are essential to the continued serviceability of an aging asphalt roof.
The meaningful result is not simply that the product affected the shingle immediately after application. It is that measurable benefits remained after the treated shingles completed a demanding accelerated-weathering cycle.
Not Every Bio-Based Rejuvenator Uses the Same Chemistry
The term “bio-based” covers a wide range of ingredients and formulations.
Some roof-rejuvenation products rely on soy-derived oils, soy methyl esters, petroleum solvents, or combinations of those ingredients. Roof Rejuvenate does not rely on soy methyl ester chemistry.
Our product uses proprietary technology made from fermented corn-derived inputs and is specifically formulated for asphalt shingles. It is USDA Certified Bio-Based and does not contain PFAS “forever chemicals.”
Roof Rejuvenate is not cooking oil, generic vegetable oil, paint, a coating, or a surface sealant.
The formula is designed to penetrate the shingle and reach the asphalt base. As asphalt shingles age and oxidize, they lose oils and become increasingly brittle. Roof Rejuvenate is designed to replenish oils within the shingle, improve flexibility, and support granule adhesion from within rather than merely changing the surface appearance.
Different rejuvenator chemistries may interact with asphalt differently. That is why product labels and marketing descriptions should never replace independent testing.
Why “Day-One” Testing Is Not Enough
Immediate testing can demonstrate that a product changes a shingle’s flexibility, color, or surface condition. It cannot, by itself, show how those changes will hold up after prolonged weathering.
A stronger product evaluation should answer questions such as:
Was the product tested on genuinely aged shingles?
Were treated samples compared with untreated samples?
Were the shingles subjected to accelerated weathering?
Were the results measured after weathering—not only immediately after application?
Did an independent laboratory conduct the testing?
Is the product supported by a meaningful warranty?
Roof Rejuvenate’s published PRI results address those questions through a simulated five-year aging study and measurable post-weathering results.
Continuing to Advance the Industry
Roof Rejuvenate USA is committed to more than making the biggest marketing claim. Our goal is to continue improving the science, performance, and value behind professional roof rejuvenation.
That commitment benefits everyone involved:
Dealers receive a differentiated product supported by independent testing, professional training, protected territories, and ongoing development.
Homeowners receive a practical alternative to premature roof replacement when their roof remains a suitable candidate.
The industry receives a higher standard for how rejuvenation products should be evaluated and discussed.
We are continually working to improve the product while maintaining pricing that allows our dealers to build healthy businesses and offer homeowners an affordable roof-maintenance solution.
Ask for the Evidence
Every manufacturer can say its product is the best. The real difference is whether the company can show what happens after the product has been subjected to meaningful aging.
Roof Rejuvenate USA did not stop with a day-one result. We asked an independent laboratory to evaluate treated, aged shingles after accelerated weathering—and the results demonstrated measurable improvements in granule retention, flexibility, and tear strength after a simulated five-year period.
That is the difference between a marketing promise and a product supported by evidence.
Want to find out whether your roof qualifies? Contact an authorized Roof Rejuvenate USA dealer for a professional evaluation.
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